[F.d.R., I guess, that this is the British translation (conversion) for: Führer
der Radar (or des Radars); F, might stand for Führer (Leader), ‘d.’ might
represent der or des, what R means is, for me, an open question, as 'radar' was
not yet used in German terminology (February 1945), AOB][The British translator often uses the
British jargon, whereas it is certain that such words were not used in German
wartime publications. Such as, for example: 'Window' where the German codename
certainly had been: Düppel, AOB]

Full transcription of a British translation of 1945

This is a most interesting document!

This periodical was
issued on 25 February 1945. We may assume, however, that the personnel in the field
might have got it in March 1945. Some of their estimated planning went as far as late 1945. We may
consider that this was the last issue of "Funkmessnachrichten" of World War Two.

It shows their latest concern in respect to radar technology. But, also what
they saw what was necessary to happen in the near future. Many topics is dealt
with, like:-

On
17 October 2011 I reconsidered the Jagdschloss A training manual and my
attention stuck at the chapter about Rießersee (page 70). In the Radar News 19
translation they deal with the newly introduced modification by replacing the
T/R diodes by a Nullode. I wondered how this might have been done. The solution
was:

Apparently,
they had modified all Jagdschloss in to version 3

The power
diodes SD6 (SD6A) had proved to be unreliable and all systems had to be modified
in the way shown in the schematic above. Please consider also the Nullode patent
doc: DE761708,
DE881812andDE897857